249143171 has 2 divisors, whose sum is σ = 249143172. Its totient is φ = 249143170.

The previous prime is 249143117. The next prime is 249143173. The reversal of 249143171 is 171341942.

Together with previous prime (249143117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249143171 - 2²² = 244948867 is a prime.

Together with 249143173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (249143173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124571585 + 124571586.

It is an arithmetic number, because the mean of its divisors is an integer number (124571586).

Almost surely, 2^249143171 is an apocalyptic number.

249143171 is a deficient number, since it is larger than the sum of its proper divisors (1).

249143171 is an equidigital number, since it uses as much as digits as its factorization.

249143171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 249143171 is about 15784.2697328701. The cubic root of 249143171 is about 629.2400099130.

The spelling of 249143171 in words is "two hundred forty-nine million, one hundred forty-three thousand, one hundred seventy-one".